Mold for casting stereotype-plates



2 Sheets-Sheet 1.

W. scoTT. MOLD FOR GASTING STERBOTYPE PLATES.

N0, Z43.981. Patented July 5,1881.

N. Prrzns. Phnkrulhognpiwr. Washington. 0.

. 2 Sheets-Sheet 2. W. SCOTT. MOL'D FOR CASTING STEREOTYPE PLATES.

No. 243,981. Patented July 5,1881.

Win ass as v' [nu enin- UNITED STATES P TENT OFFICE.

WVALTER SCOTT, OF CHICAGO, ILLINOIS.

MOLD FOR CASTING STEREOTYPE-PLATE S,v

SPECIFICATION forming part of Letters Patent No. 243,981, dated July 5,1881.

application filed June 18,1879.

To all whom it may concern Be it known that I, WALTER SCOTT, of Chicago,in the county of Cook and State of Illinois, have invented certain newand useful Improvements in Molds for Gastin g Stereotype- Plates, whichare fully described in the following specification, reference being hadto the accompanying drawings, in which- Figure 1 represents a plan viewof a mold embodying my improvements in position to receive the matrix orto remove the plate after casting; Fig. 2, an end elevation of the same,

looking toward the bottom end of the mold, and with the cope thrown up;Fig. 3, a transverse section of the same, taken on the line y y, Fig. 1;Fig. 4, a longitudinal section of the same, taken in the line as 00,Fig. 5 Fig. 5, a side elevation of the same, the mold being tilted inposition for turning the molten metal; Fig. 6,a bottom plan of the cope;Fig. 7, a detail section taken on the line. 2 a, Fig. 2; and Fig. 8 aplan of one of the side bars.

My invention relates to a mold for casting curved stereotypeplates foruse upon cylinder-presses.

The invention consists in special mechanisms and combinations ofdevices, which will be hereinafter fully described, and will be pointedout definitely in the claims.

In the drawings, A represents a supportingframe, which in this instancehas triangular end pieces, in the upper ends of which the drag B of themold is mounted by means of trunnions 1) near the middle of the drag,which are supported in suitable bearings a on the end pieces. The dragis concave, the curvature corresponding to that desired in thestereotype-plate.

The cope O is made, as usual, so as to fit into the drag B, and isprovided upon its convex surface with transverse grooves c for formingthe usual ribs on the concave surface of the stereotype-plate. On oneside of the cope are lugs D, projecting laterally from the upper edge ofthe cope. These lugs are hinged or pivoted to suitable lugs, D,projectin gfrom one side of the drag, near the upper edge thereof, sothat the cope is thereby attached by a hinge joint to the drag, thehinges being arranged at one side of the mold, which permits the cope tobe raised from the drag and turned outward to one side thereof.

\Veights E are either cast with or attached to the lugs D, beingarranged on arms which extend beyond the pivotof the hinges, as shown inFig. 1 of the drawings. These weights coun: terbalance the weight of thecope, so that the latter is easily raised and turned outward on itshinges. 0n the opposite side of the cope are lugs F, which have oneportion, a smooth face, f, slightly raised above the edge of the cope,and another portion,f, projecting still farther upward and outward,which furnish bearings for a shaft, G, on which are arranged cams g. Theshaft is also provided with a handle, 9.

Olamps H are pivoted to the side of the drag, and are arranged so as tobe turned up over the facesj' when the cope is lowered into the drag,and are provided at their upper ends with clamp-screws h, which areturned down upon the facesf to fix the cope in position and hold itfirmly there. I

At the lower or inner end of the drag is a bar, I, which is curved tofit the'concavity of the drag, and is provided on its outer edge withnotches t','.arranged to engage with pins 43 on the drag, by means ofwhich it is heldin place, while at the same time it may be vibrated andremoved whenever desired, and to facilitate its removal or vibration isprovided at one end with a-handle, 4J projecting outside beyond the sideof the drag. The inner edge of this bar is beveled to correspond to thebevel which is desired on the end of the stereotype-plate. There arealso notches or recesses 73 cut in this inner edge of the bar at or nearthe edges of the drag. There are also provided side bars, K, the innerends of which are stepped so as to make a projection, 70, adapted toenter the recess i in the edge of the bar I. These side bars are beveledat their inner edges, and are cut away slightly on'the The bars aretached from the drag or placed therein, as occasion requires.

At the upper end of the drag there is also a curved plate, L, adapted tofit the drag, and extending into the latter beyond the end of the copewhen closed. this plate are known and do not require particulardescription here.

A spring-lever, M, is attached to the supporting-frame and provided nearits upper end with a stud, m, which is arranged to enter a series ofholes, m, in one ofthe trunnions of the drag, whereby the latter islocked in either a horizontal position, as shown in Fig. 4 of thedrawings, or a nearly vertical position, as shown in Fig. 5.

In operation this mold is used in the usual way. The matrixbeingplacedin position and the cope closed down into the drag, the moldis turned into the position shown in Fig. 5 of the drawings, when thetype metal is poured into the mold at the upper end. When the metal iscooled in the mold thelatter is turned back again into the horizontalposition, as shown in Figs. 1 and 4 of the drawings, and the cope isreleased and swung upward and outward to one side, as 'shown in Fig. 2of the drawings. The side bars are removed and the plate started byturning the curved end bar I inward, the upper pins on the drag servin gas pivots for this purpose. The cast plate may then be readily removedfrom the drag.

It is evident that the rabbets on the edges of the side bars will permitthe edges of the matrix to enter the space underneath the edges of theside bars. This holds the matrix in place and prevents it from slipping.

As stated above, the mold is fastened in its The object and use of wardwith ease.

upright or horizontal position by means of the spring-lever M. The copeis started from its position in contact with the type-metal by turningthe lever g, wherebythe cams 9, acting upon the edge of the drag, willlift the cope slightly from the metal, overcoming all stickin g, so thatthe cope may be then turned out- The hinging of the cope so as to swingit outward at one side of the drag obviates all necessity of any specialform of groove or hinge, for the movement of the cope is in direct linewith the grooves in its convex surface, and therefore when started awayfrom the plate there will be no danger of injuring the ribs on thelatter.

Having thus described my invention, what 1 claim as new, and desire tosecure by Letters Patent, is-- 1. The pivoted drag B, in combinationwith the cope U, having transverse grooves on its convex surface andhinged at one side to the drag, whereby when the cope is swung outwardthe grooves are lifted in straight lines from the metal which theyinclose, thus preventing pinching, substantially as described.

2. The drag B,in combination with the cope U, hinged to one side of theformer, and the counterbalancing-weights E, attached to the cope andextending outside of the hinged pivots, substantially as described.

3. The spring-lever M, provided with stud m, in combination with thepivoted drag B, provided with a series of holes, m, in one of itstrunnions, substantially as described.

WALTER SCOTT.

Witnesses:

L. A. BUNTING, J. W. MILLINGTON.

